Preformed expansion joint



Feb. 12, 1929.

H. B. PULLAR PREFORMED EXPANSION JOINT Original Filed Dec. 11, 1925 2 Sheets-Sheet l u/ /w i Feb. 12, 1929. 1,701,628

H. B. PULLAR I PREFORMED EXPANS ION 0 INT Original Filed Q66. 11, 1925 2 Sheets-Sheet 2 1 aha 7265s: Z 72 2 6 72 to 7 r farold jfalz'ar," I

Patented Feb. 12, 1929.

, UNITED STATES HAROLD B. PULLAR, OF DETROIT, MICHIGAN.

rnnromzrnn EXPANSION JOINT.

Application filed December 11; 1925, Serial No. 74,690. Renewed May 24, 1928.

This invention relates to improvements in a pro-formed expansion joint, and refers more particularly to an expansion joint which will be adaptable to numerous and varied uses, for instance, in the construction of concrete, brick, wood-block and 'other forms of monolithic pavement .or road construction where expansion joints are employed, as well as in the construction of buildings, foundations, bridges, reservoirs and other types of monolithic concrete construction, and includes innumerable other arts where the use of a high grade preformed expansion joint of the character herein described is desirable.

Expansion joint-fillers should'possess certain inherent roperties and characteristics, for instance, exibility to allow for roper expansion and contraction, and rigi ity to permit economical stacking, shipping, an-

dlin and installation. T e expansion joint of the present invention possesses these desirable properties and characteristics to a marked degree.

Briefly, the expansion joint of the present invention comprises a reinforcing base of substantiall rigid material, for instance, metal, woo or the like, filled witha bituminous compound. This bituminous compound may be allowed to come into direct contact with the surface of the concrete, brick, rock or other material so as to insure a firm, waterproof coat, or the bituminous filler may be so constructed as to permit a firm bond between the expansion joint and 'theima'terial adjacent to it.

In the drawings,

Fig. 1 is a top lan view illustrating a roadway utilizing tie pre-formed expansion joint of the present invention;

Fig. 2 is a greatly enlar ed cross sectional view taken on line 22 of Fig. 1;'

Fig. 3 is an enlarged fragmentary front View of the filler in place, illustrating the various depths of material;

Fig. 4 is a side elevational view of a slightly different form of the pre-formed expansion joint for use as building material;

Figs. 5 and 6 are, respectively, cross sectional views taken on line 5-5 and line 66 of Fig. 4.

Referring more in detail to the drawings, the reinforcing bar 1, referred to as a whole, com rises the body ortion 2 and the end sections 3 and 4. T e body portion 2 may comprise a substantially flat piece of metal,

wood or other substantially rigid material, and the end sections 3 and 4 may be of the same material or of different material, it being preferable that the end sections 3 and 4 be disposed at substantially right angles to the body portion 2.

As a feature of the invention, the ends of the body portion may be slotted, as shown at 5, to register with the ribs 6 projectin' inwardly from the inner surfaces of the en sections 3 and 4. The purpose of this form of locking connection is to insure a secure locking and at the same time provide that these end sections may be removable. The advantage of roviding a collapsible reinforcing base, rom the viewpoint of stacking and storage, will be instantly apparent. In addition, as 'will be hereinafter more particularly brought-out, the upper end section 3, after the expansion joint is in place, may be-removcd and dispensed with. It is, of curse, understood that the slots 5 and-ribs 6 may be reversed, that is, they may be positioned in either the body portion 2 or end sections 3 and 4. I The thickness of the .body portion 2 preferably should not be more than one-half the thickness of. the completed re-formed joint. As'will be seen by a stu y of Figs. 2 and 5. the reinforcing base 1 is of substantially I-bar construction.

It is obvious, of course, that the end sections 3 and 4. may be an integral part of the body portion 2, if desired.

After the skeleton construction 1 is formed, there is poured, forced or formed in the areas adjacent the surfaces of the body portion 2 a bituminous compound 7 such as pure asphalt or an asphaltic material having a-melting point of not less than 150 F.

more or less and not exceeding 300 F. more or less, it having been predetermined that bituminous material within this range is sufiiciently flexible to permit desirable expansion and contraction. The bituminous compound of course is preferably formed 1' poured into said areas while in heated condition, and while still warm may have imbedded on its surface a thin layer of granular material 8, for instance, stone, slate, granite chips, sand, fine gravel, or other granular substances, preferably of a size not greater than would pass a 4- sieve. If the granular surfacing 8 is not desirable, a coating of talc, cla mica, or similar substance may be applie to the outside surfacing. to

prevent sticking of the bituminous surfaces when coming in contact with other surfaces.

9 designates a fragment of the adjacent concrete or monolithic pavement, and 10 designates the ground on which the pavement is i laid.

'lherefore, according to the present invention, I provide a pre-formed expansion joint which has the desirable properties and characteristics hereinbefore listed. The thickness of the whole joint may vary from inch to 2 inches; the thickness of the reinforcing bar 1 may vary from a thin veneer to 4 inch lumber or up to 20 gauge metal.

Among other advantages of, having the end sections 3 and 4: removable may be set forth ease in manufacture and installation.

I claim as my invention:

1. A pro-formed expansion joint comprising a reinforcing body portion of substantially rigid non-bituminous material surfaced with a bituminous compound, said body portion being provided on op osite ends with enlarged head portions 0 substantially rigid non-bituminous material.

2. A pre-formed expansion joint comprising a reinforcing base of substantially rigid material filled with a bituminous compound, said base comprising a body portion and angularlydisposed end sections, which latter may be movable relative to the body portion.

3. A pro-formed expansion joint comprising a reinforcing base of substantially rigid material filled with a bituminous compound, said base com rising a body portion and angularly disposed end sections simulating an I-bar.

t. A pro-formed expansion joint comprising a reinforcing core ofsubstantially rigid non-bituminous material filled with a bituminous compound, said core comprising a body portion and enlarged head portions on opposite ends of the body portion.

5. pro-formed expansion joint commenses prising a reinforcing base of substantially rigid non-bituminous material filled with a bituminous compound, said base comprising a body portion and enlarged end portions simulating in shape an 1 bar.

6. A pre-for'med expansion joint comprising a base of substantially rigid material surfaced with a bituminous compound, and provided on each end with angularly disposed material-retaining end sections.

7. A pre-formed expansionjoint comprising a base of substantially rigid material surfaced with a bituminous compound, and provided with angularly disposed materialretaining end sections, substantially simu lating in shape an I-bar. 8. A preformed article ("if manufacture comprising a supporting base of substantial I-bar construction, and having a filling intermediate its ends of bituminous material, to

which is ap )lied a granular surfacing.

9. A preformed article of manufacture comprising a body portion recessed on both surfaces and having retaining side edges, and a filling of bituminous material in said recesses.

10. A preformed article of manufacture "including in combination, a support comprising a portion having a recessed surface intermediate its side edges in a continuous longitudinal direction so that said sides extend above the lane of said intermediate portion, and a lling in said recessed surface comprising bitumen.

11. A preformed article of manufacture including in combination, a support comprising a portion having a recessed surface intermediate its side edges in a continuous longitudinal direction so that said sides extend above the plane of said intermediate portion, anda filling in said recessed surface comprising bitumen, the surface'of which filling material lies substantially flush with the surfaces of said sides.

' HAROLD B. PULLAR. 

